Swaging tool



May 23, 1944-- H. E. ENDERS 2,349,493

SWAGING TOOL Filed June 5, 1943 u. Llllllllll\ I 3K i 6 5 1i I 4 INVENTOR #060 E. [Na /e5 v L 10. @hbmom v40? ATTORNEY Patented May 23, 1944 SWAGING TOOL Hugo E. Enders, Belleville, N. J., assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application June 3, 1943, Serial No. 489,544

1 Claim.

The invention relates to a swaging tool for use in anchoring or locking a machine screw in the metal wherein it is countersunk by swagin metal into an end portion of the kerf of the head of said screw, an object of the invention being to provide an improved tool of this description which will obviate necessity for expert work and be simple in construction and operation.

The invention consists in the novel construction and combinations of parts as hereinafter set forth in the claim.

In the accompanying drawing,

Figure l is a side elevation of the invention as applied, the machine screw being shown as partly in section and the metal wherein the screw is countersimk being shown in section.

Figure 2 is a view similar to Figure 1, taken at right angles thereto.

Figure 3 is a bottom plan view of the tool.

Figure 4 is a detail fragmentary view similar to the lower part of Figure 1, showing a modification of the invention, the swage member being shown as punched down prior to being struck by a hammer.

Figures 5 and 5a show detail fragmentary opposite end views, respectively, and Fig. 5b. shows a detail side View of the lower end portion of the swage member, including the bit provided with the cam inclines.

In the drawing, the numeral 2 designates a staff member of the tool, the lower end of which is provided with a transverse straight edge portion 3 adapted to fit within the kerf or slot of the head of a machine screw 4 to leave a vacant space 5 at one end portion of said kerf, and 6 is a spring retracted channeled swage member slidably mounted upon and embracing said staff member at the side thereof opposite said vacant space and projecting above the staff member.

The staff member 2 is provided with upper and lower spaced guides l for the swage member, the retracting spring for which is designated 8. The swage member is provided with a radial pin 9, adapted to contact the upper of the guides l to limit its retraction. The retracting spring 8 surrounds the upper portion of the swage member and abuts at its upper end against an upper collar III of the swage member and at its lower end against the upper f the guides I and the top of the staff member.

In use, the tool is grasped by the upper portion of the swage member thereof, the lower transverse straight edge portion 3 of the tool is engaged within the kerf or slot of the head of the screw 4 and the tool is manually displaced endwise of said kerf to abut at its lower end 3 against the metal wherein the screw is countersunk to leavethe vacant space at one end portion of said kerf. The swage member of the tool is then pushed down against the tension of its retracting spring until its lower bit end contacts the metal wherein the screw is countersunk, the top of the swage member of the tool being then struck sharply with a hammer, thereby causing the lower bit end of the swage member to swage metal into the end portion of said kerf opposite said vacant space against the adjacent lower straight edge portion 3 of the staff member to forcibly shift the tool to occupy said vacant space.

The tool being free to move endwise of the kerf in the head of the screw 4 towards the vacant space 5 of said kerf and. being otherwise held from movement, when the swage member of the tool is struck with the hammer the lower bit end thereof will tend to depress the metal wherein the screw is countersunk into the end portion of said kerf opposite said vacant space against the lower straight edge portion 3 of the tool to thereby forcibly shift the tool to occupy said vacant space. The lower bit end of the swage member of the tool is provided with converging cam inclines l I intersecting in a cutting edge and the outer of which has the greater incline to the horizontal to increase this tendency and insure the functioning of the swage member as stated.

A modification of the invention is shown in Figure 4, of the drawing, wherein similar parts are referred to by similar reference characters differentiated by the exponent I. In this modification, the shape of the lower straight edge portion of the staff member of the tool is slightly different from that of the main form of the invention due to the different shape of the screw head.

The engagement of the lower straight edge portion of the staff member of the tool with the kerf or slot of the head of thescrew 4 serves as a locating means for the swage member of the tool, thereby obviating necessity for expert work in the use of a chisel, swage or other tool having no such locating means.

I claim:

A swaging tool for use in locking a machine screw in the metal wherein it is countersunk, including a staff member having a lower transverse straight edge portion adapted to fit within the kerf of the head of said screw to leave a vacant space at one end portion of said kerf, and a spring retracted channel swage member slidably mounted upon and embracing said staff member at the side thereof opposite said vacant space, said swage member projecting above said staff member and having at its lower end a bit provided with opposite intersecting cam inclines adapted to swage metal into the end portion of said kerf opposite said vacant space against the lower straight edge portion of the staff member to forcibly shift the tool to occupy said vacant space.

HUGO E. ENDERS. 

